How can you know if this equation is true 1/3 + 1/5 = 2/8 = 1/4

The sum of two numbers is 86, and their difference is 20. find the two numbers

Which of the statements about the graph of the function y = 2x are true? check all of the boxes that apply. the domain is all real numbers x because the exponent of 2 can be any real number when the x-values increases by 1 unit, the y-value multiplies by 2. the y-intercept is (0, 1). the graph never goes below the x-axis because powers of 2 are never negative. the range is all real numbers.

Y=(x+3)(x-4)(x+1)^2 sulutions? multiplicity?